Time-computing device.



C. L. HiLL. TIME COMPUTING DEVICE.

APPLICATION FILED DEC. H. I9l7- 1,277,723, iutentedSept. 3, 1918.

gal-5% 19201972207 6. L H/u.

fig A21 flfiorney 54.9 @Auwi/ illustratethe invention,

' 'a'nniilarl ii 1n the-framed, under the cover CHA R-LES L. HILL, OFALBERT LEA, MINNESOTA.

TIME-COMPUTING DEVICE.

Specification of Letters Patent.

Patented Sept. 3, 1915.

Application filed December 17. 1917. Serial 110.207.399.

To all w]: om it may concern:

lie it known that 1, CHARLES L. HILL, a citizen, of the United States.residing at Albert Lea, iu the county of Frneborn and State ofMinnesota. have invented certain new and useful hmn-orcments inTime-(Tone puting Devices: and l do hereby declare the following to he afull, clear, and exact description of the invention, such as will on.able others hlilllitl in the art to which it uppertains to make aml usethe same.

My invention has for its object to provide an extremely simple andhighly ellicient computing device for finding the time in months anddays within a your limit, that has elapsed since any past date and thecurrent date, or between the current date and some future date, orbetween any two dates.

To the above end, the invent-ion'consists of the novel devices andcombinations of devices hereinafter described and defined in the claims.In the nccompanying drawin" I like chhifactcr's indicote like partsthroughout the several. .viei'vs.

Referring to the drawings;

Figure 1 is a face view of the.=-invention;

Fig. 2 is a. view corresponding to Fig. 1, .with the exception that thecover plate is removed and some parts broken away; and

Fig. 3 is a. view in sectiontaken on the line 3-3 of Fig. 1. Z

The numeral 4 indicotesia frame having a removable cover 'plate '5heldin position by upper and lovver turn-buttons 6. This rental sightlope'nm open in -38," which sf ,Formed in lihe ramex to. 5 and ibe-sigh,m

thefienie 4, a pivot in having rotati vel y mounted thereon'a dlsk lL.Rigidly secured "to-the. edge of the disk 11-, isa radially projectingfinger piecelQ, by which said disk be iven half rotations eitherdirceet. the

ttom' 'Thef fre e142 momma of leftof the recess 9 is a guide ndsjiier'allel to; said guide channted' to slide inthe guide channel sa'fmovoble scale 15, graduated from e rcept'iior avg-quark straightsight 1 at large cats, from .the; top t himn, 13, been mscal'e bnr 14,-

otheru'isv marked thereon the names of the months, towit: January toDecember, inclusive. reading from the top down.

Marked on the cover plate 5, on a line e. tendiugat right angles to thesightopening, 8 and through the axis of the disk 11, is an indicator 16into registration with "which anyoneo'l the twclvemonths may lnsbroughtby moving the scale 15. This movable scale is moved cndu'isc in theguide channel 1 3 by a finger piece 17. which works through an opening18 between the frame 4 and scale bar 14. The peripheral upper edgeportion of the disk ll is graduated into sixty-tw di visions, thirty-oneof which are indicated by thenumerals l to 31, inclusive, and

-ed on the two scales 19 and 20 all read in the same direction. 'Tolinike the two scales 1'.) and 20 distinctive, the. numerals on thelatter are preferably in red. By turning the. disk" 11' with the fingerpiece 12, the scalcs lfl md 20 may be moved under the sight. opening 7and the scale 19 may be moved pii'st the indicator 16.

. Concentric with the movable scales 19 and 20 and also the sightopening 7, is a quadrantal fixed scale 21 graduated into thirtyonedivisions. indicated by the numerals O to 30. inclusive, printed orotherwise marked on the. cover plate 5, inward of the sight. opening-7.It is important to note that the zeronmrk on the fixed scale 21 isdirectly opposite the indicator 16 and'that the numerals read fromtheleft to the right,

whilethe numerals of the cooperating movable scales 19 and 20 read fromthe right to' the' left.

The fixed scale bar 14 is graduated from top to bottom andthe-graduations are indicated byt o columns of lllllllflllllS of twogroups eae: and both colunms of numerals read from the bottom upward.The lower and upper groups of numerals in the righthand column areindicated by the numerals 23 and-22, respectively, and the lower andupper groups of numerals inthe left-hand column. are. indicatedhy thenumerals 25 and 24, respectively. The numerals "in group rcad.l to 11.,inclusive, and the numorals in group 22 read 0 to 11, inclu sive, thezero graduation being directly opright-hand column.

To make the two columns of numerals on the fixed scale bar 14distinctive, with respect to each other. and associate the same withthe. two movable scales l9 and 20, the numerals in the righthand columnare black to associate the same with the black numerals of the movablescale 19 and the numerals in the left-hand column are red to associatethe same with the red numerals of the movable scale 20. -]t is, ofcourse, undcisto'od that in place of using red and black colors, indistinguishing the two columns of numerals on the fixed scale 14, withrespectto each other, and associating the same with the two movablescales'19 and 20, suitable other distinguishing characteristics may beused.

From the above description, it is evident that by operating the fingerpiece 12. the movable scales 19 and 20 may be oscillated beneath thesight opening 7 to bring certain of the numerals indicated on the fixedscale 21.- It is also evident that by moving the finger piece 17 any oneof the months,.i'ndirated on the movable scale 15, may be brought intoregistration with the indicator 16." lVhen-on'e' of the months indicatedon the scale15'is in registration with the indicator 16, the othermonths are directly opposite certain of the numerals in the severalample, suppose we wish to know groups 22, 23, 24 and 25;

- In the drawings, the movable scale 15 is in a position which bringsthelmoi'ith of November .in registration with the indicator 16. It willalso be noted that the numeral 14 of the movable scale '19 isinregistrationwith the indicator 16,-so that the computingv deviceis'set to read NoremberM, which is assinncd to be the. present day.iForexhow long a note has run, dated Julyv 19tlii The first which. as

.month in days step to locate the numeral 19011 the scale'2l'; andradially opposite this numeral is the numeral 25 in the movable Scale20, previously stated, is in red ink to associate the same with theleft-hand column of numeralsof the same color, including groups 24' and'25.-tif the fixed 801110.151.

This numeral 25. of the 'movable scale 20 represents the' interveningfraction. of a The ncxtistep is ito locate the month of -.Tuly on themovable scale 15 and opposite:

of the movable scales, scales being graduated. .to represent thelictwi'rclr July 19th and :No

months between July 19th and November 14th. It will thus be seen thatthe time elapsed between July 19th and November 14th is 'three calendarmonths and twenty five days.

By reference to the drawings, it will be noted that plus signs aremarked on the movable scale 15 in the graduations next below the monthshaving 31 days, towit: Jannary March, May, July, August, October andDecemberQand that the minus sign is marked in the graduations next.below the month having less than-thirty days, towit: February. Thepurpose of these plus and minus signs is for use in determining theintervening days between two given dates, when it is desirous ofcalculating thirty-day months. In the example previously given. thenumber of days between July 19th and November 14th and twenty five days.

If it is desirous of determining the number of days for the-same period.working on the basis of thirty-day months. it will be hccessary' to addto the total number of days the three extra days included in the monthsofJuly,'August and October. orin other words. the number of plus signs.indicated betwecn'the months of July and Novemben The above describeddevice, while extremcly simple and of smallcost to manufactine, has; inActual usage. proven highly efficientfor the, purpose had in view.

\Vhat I claim is v v A time computing device comprising a. frame, twocooperating movable scales, and two fixed scales cooperating one witheach of the movable scales, one of said movable scales being graduatedto represent the months of a year and the cooperating fixed scale.having two distinctive sets of nume'ralsthe numerals ofeachset beingarranged in two groups, each representing intervening months, the otherof saidmovable scales having two distinctive sets of. nu-

'merals reading in the same direction and scalebeing graduated torepresentthe-days].

of a 'month; -2. A time computing-device comprising a.

frame, two cooperating movable sca1es,'and

two fixed scales cooperating, one. with each months of a year and thecooperating fixed,

scale: having two distinctive sets of nuone of said movable morals. thenumeralsof each 'set'beingar-i' rz'inged in t-wo'groups eachrepresenting intcrvcn'ing'months. the huuu-rals inthe two 1 groupsofcaeli' sct reading in the same" diirctiou. -t|uothecof said movablescales having two distinctive sets ofnumerals successively reading inthe same direction and each of said sctsJqwt-sent-ing intervening daysof a month and the cooperating fixed scale being-graduated torepresentthe days of'a month. i

3. A time computing device comprising a frame. an indicator, two movablescales 00- operating with the indicator, and two fixed scalescooperating, one with each of the movable scales, one of said 'm'ovablescales being graduated to represent the months of a year and thecooperating fixed scale having two distinctive columns of numerals, thenumerals of each column being arranged in two groups, each representingintervening months, the numerals of one of said sets reading from theindicator in one direction from 0 to fll and in the other direction from11 to l, the numerals of the other of said sets reading from theindicator in one direction .from 0 to 10 and in the other direction from11 to 0;

4. A time computing device comprising a -frame, an indicator, twomovable scales cooperating with the indicator, and two fixed scalescooperating, one with each of the movable scales, one of said movablescales being graduated to represent the months of.

a year and the cooperating fixed scale having two distinctive columns ofnumerals representing intcrvening months, the numerals of each columnbeing arranged in two groups, the two groups ofnumerals at one end ofsaid fixed scale reading away from the indicator and the two groups atthe other end thereof reading toward the indicator, the other of saidmovable scales having two distinctive sets of numerals successivelyreading in'thesame direction and each of said sets representingintervening days of a month and the cooperating fixedscale bev end oisaid fined cale reading awayfrom the" indiea'toFand the two groups atthe other end thereof reading toward the indicator, the correspondingnumerals in oppositegroups of the two columns being set one above theother, the other of said movable scales having two distinctive sets ofnumerals successively reading in the same direction and each of saidsets representing intervening days of a month and the con operatingfixed scale bein graduated to represent the days of a mont Intestimony'whereof I aflix my signature in presence of two witnesses.

CHARLES L. HILL. -Witi1esses:

Joint E. RaNsoM, ANNA S. JACKSON.

